Container



Nov. 5, 1968 J. CHMIYELQWIEC CONTAINER Filed Oct. 24, 1965 PRIOR ARTINVENTOR- LOUIS a. CHMIELOWIEC ATTORNEYS United States Patent ABSTRACTTHE DISCLOSURE This invention relates to a container having a bodyclosed byan end secured thereto byafoldedseam. The end includes a paneland a'chuck wall with a lower portionof the latter converging downwardlyand radially inwardly toward the end panel. Adhesive means havingappreciable tensile strengthcharacteristics is disposed in thespace'between the chuck wall and the body for bonding the same to eachother and for additionally reinforcing the chuck wall against radialinward deflection there of due to the influence of pressure within thecan reacting. on the end panel.

v, Therehave beenmany recent developments in the formation of can ends.Many of these developments relate to the forming of the can ends ofthinner gauge metal both for the purpose of facilitating the opening ofthe associated container and for purposes of economy. However, it hasbeen found that when a can end is formed, of a lighter than normal gaugemetal and the can of which the canend is a part is subjected to highinternal pressure, the can end has a tendency to buckle andbulgeoutwardly. This is obviously undesirable.

It .has been found that while a minute portion of the buckling andbulging of the end panel of the can end has been due to a stretching ofthe metal, a major portion thereof has .been due to the distortion ofthe chuck wall of the canen-d. Thus, if the chuck Wall of the can endis.reinforced, the buckling and bulging of the end panel will be greatlyreduced. Until now, the approach towards. the reinforcing of the chuckwall has been by reversely folding the metal. of the can end immediatelyadjacent the chuck wall. This reverse folding of the metal not onlyrequires additional metal, but also requires expensive folding steps.

In view of the foregoing, it is the object of this invention toreinforce the chuck wallof a can end against radially inwardly directeddeformation due to pressure exerted on the associated end panel byadhesively bonding the chuck wall to the adjacent can body whereby thecan body reinforces the chuck-walk It will be readily apparent that whenthe chuck wall is adhesively bonded tothe can body, the can body and thechuck wall, together with the double seams securing the can end to thecan body, all function as a rigid unit and when the chuck wall cannotmove away from the end wall, the deflection of the end panel, such asbuckling and bulging, is restrictedto the metal which becomes availableby the stretching of the metal of the end panel.

It has been found that the necessary adhesive may be readily applied tothe chuck wall of a can end prior to the assembling of the can end witha can body, and in the act of assembling the can end with the can body,the adhesive will automatically be directed against the can body so asto form the desired bond between'the can body and the chuck wall.

With the above and other objects in view that will hereinafter appear,the nature of the invention will be more clearly understood by referenceto the following detailed description, the appended claims and theseveral views illustrated in the accompanying drawing.

3,409,168 Patented Nov. 5, 1968 'Inthe drawingt p FIGURE 1 is anexploded fragmentary perspective view of a can end formed in accordancewith this inventionand a conventional can body to which it is being pp aFIGURE 2 is an enlarged fragmentary vertical sectional view of the canbody and can end of FIGURE 1 and shows more specifically the details ofthe same and the relationship between the same prior to the assemblingthereof.

FIGURE 3 is an enlarged fragmentary vertical sec tional view takenthrough the can end after it has been assembled withthe can body andsecuredlthereto by means of a conventional double seam. 7

FIGURE 4 is a fragmentary vertical sectional view similar to FIGURE 3and shows the state of the prior art prior to this invention.

Referring now to the drawing in detail, reference is first made toFIGURE 4 wherein there is illustrated a conventional can which isgenerally referred to by the numeral 5. The can 5 includes a can body 6having the upper end thereof closed by means of a can end which isgenerally referred to by the numeral 7. The can end 7 is secured to thecan body 6 by means of a conventional double seam 8. It is to be notedthat in addition to the double seam, the can body 7 includes a chuckwall 9 and an end panel 10. The end panel 10 is connected to the chuckwall 9 by means of a chuck radius 11.

Normally the can end 7 is formed of a sufliciently thick gauge metal soas to resist deformation due to internal pressures within the can 5.However, when the gauge of the metal has been reduced, it has been foundthat the high pressure within the can 5 reacts against the relativelylarge area of the end panel 10 and results in the axially outwardbuckling and bulging of the end panel 10. Further, as the end panel 10bulges outwardly, it exerts a radially inwardly directed force on thechuck wall 9 through the chuck radius 11 with theresult that the chuckWall 9 is deformed radially inwardly and the can end 7 generally bend-salong the chuck radius 11. As a result, the can end 7 is deformed tohave a shape, such as that generally shown in dotted lines in FIGURE 4.The deformation shown in FIGURE 4 is relatively mild and in certaininstances the chuck wall 9 is deformed sufficiently so as to destroy theseal of the double seam 8. It is proposed, in accordance with thisinvention, to make a can end similar to the can end 7 and of a lightgauge metal, but wherein the chuck wall is reinforced when assembledwith a can body so as to resist deformation when the end panel of thecan end is subjected to highpressures.

Referring now to FIGURE 3, it will be seen that there is illustrated acan 12 which is very. similar to the cam 5. The can 12 includes a canbody 13 which may be identical with the can body 6. The upper end of thecan body 13 is closed by means of a can end, generally referred to bythe numeral 14. The can end 14 is secured to and sealed relative to thecan body 13 by means of a conventional double seam 15. The can end 14,in addition to the portion thereof forming parts of the double seam 15,includes a 'chuck wall 16 which is joined to the end panel 17 by meansof a chuck radius 18. It is to be noted that the upper portion of thechuck wall 16 is disposed closely adjacent the inner surface of the canbody 13. On the other hand, the lower portion of the chuck wall 16 isinwardly tapered and diverges away from the can body.13. This taperingof the lower portion of the chuck wall 16 results in the formation of agenerally triangular cross sectional space 20 between the chuck wall 16and the can body 13. The space 20 is filled with an adhesive 21 whichserves to bond the chuck wall 16 to the can body 13 Whereby the upperportion of the can body 13, the chuck wall 16 and the double seam formsa rigid structural unit.

The adhesive 21 is preferably in the form of a thermosetting cementwhereby after the can end 14 and the can body 13 have been assembled anddouble seamed together in a normal closing operation, the can may beslightly heated so as to set the adhesive 21.

It is also to be noted that the adhesive 21 extends inwardly of the canbeyond the chuck wall 16 and about a major portion of the chuck radius.It is also to be noted that along the can body 13 the adhesive 21extends inwardly beyond the end panel 17 so as to form a fillet 22. Thisfillet 22 reinforces the connection between the chuck wall 16 and thecan body 13 and greatly retards any initial rupture of the bond.

Referring now to FIGURES 1 and 2 in particular, it will be seen thatthere is illustrated the details of the can end 14 prior to thesecurement thereof to the can body 13. It is to be noted that the chuckwall 16, prior to the attachment of the end 14 to the can body, tapersdownwardly towards the end panel 17. It is also to be noted that theupper end of the chuck wall 16 terminates in the usual peripheral curl23 normally found in can ends which are to be double seamed to the canbody. The adhesive 21 is applied to the can end 14 prior to theassembling thereof with the can body 13. It is to be noted that theadhesive 21 increases in thickness downwardly so as to be generallytriangular in cross section. The adhesive 21 has an outer surface whichis substantially cylindrical. It is also to be noted that the outersurface of the adhesive 21 is'rounded as at 24 where it passes aroundthe chuck radius 18.

At this time it is also pointed out that the can body 13 is provided atits end with a conventional flange 25 for cooperation with the curl 23in the formation of the double seam 15. Due to the configuration of theupper end of the can body 13, it will be seen that when the can end 14is moved downwardly into the can body 13, the adhesive 21 will freelymove into the can body 13. At this time it is pointed out that theadhesive 21 is substantially solid at the time the can end 14 is appliedto the can body so that there is no wiping off or smearing of theadhesive 21. However, during the double seaming operation, when theupper portion of the chuck wall 16 is deformed to generally conform tothe can body 13, it will be readily apparent that there will be asqueezing out of the adhesive 21 so that the adhesive will be reshapedto have the configuration shown in FIGURE 3.

The adhesive 21 securely bonding the chuck wall 16 to the upper part ofthe can body 13, the chuck wall 16 and the can body 13 form a rigid unitwhich resists deformation from the influence of internal pressures onthe end panel 17. Thus, the can end 14, as applied to the can body inthe manner shown in FIGURE 3, may be formed of lighter than normal gaugemetal and at the same time will not have the disadvantages previouslyresulting from utilizing such light gauge metal.

It is pointed out here that although the can end 14 is illustrated ashaving a plain end panel 17, the end panel 17 may be provided with anarrangement of offset panels for reinforcing purposes. Also, it ispointed out that while the can end 14 is of the type which wouldnormally be opened with a punch type opener, the end panel 17 may haveincorporated therein any easy opening feature of the type which includesa removable panel portion.

I claim:

1. A can particularly adapted for the packaging of a product under ahigh pressure, said can comprising a can body having at least one endthereof closed by means of a can end secured thereto by means of afolded seam,

said can end including an end panel and a chuck wall, said chuck wallforming part of said seam and being disposed in telescoped relationwithin an end of said can body, said end panel being subjected tooutward bowing under pressure, non-metallic adhesive means havingappreciable tensiie strength characteristics for bonding said chuck wallto said can body and for reinforcing said chuck wall against radialinward deflection due to the influence of pressure within said canreacting on said end panel, and said folded seam being devoid of saidadhesive means.

2. The can of claim 1 wherein said adhesive reinforcing means extends onsaid can body axially inwardly beyond said chuck wall and forms a filletreinforcing the bonded connection between said chuck wall and said canbody.

3. The can of claim 1 wherein said adhesive reinforcing means is athermosetting cement.

4. The can of claim 1 wherein said adhesive is a bonding material suchas thermosetting cement or solder.

5. The can of claim 1 wherein said chuck wall includes an outer portiondisposed in an axial direction which is tightly clamped against said canbody and an inner portion disposed in an axial direction converginginwardly from said can body in a radial direction appreciably beyondsaid folded seam to leave a space between said chuck wall and said canbody, and said adhesive reinforcing means fills said space.

6. The can of claim 5 wherein said adhesive-reinforcing means is athermosetting adhesive.

7. The can of claim 1 wherein said chuck wall is connected to said endpanel by a chuck radius, and said adhesive-reinforcing means alsoextends between said chuck radius and said can body.

8. The can of claim 7 wherein said adhesive reinforcing means extends onsaid can body axially inwardly beyond said chuck radius and forms afillet reinforcing the bonded connection between said chuck wall andsaid can body.

9. The can of claim 8 wherein said adhesive-reinforcing means is athermosetting adhesive.

10. A can end particularly adapted for use as a part of a can subjectedto internal pressure and formed of sheet metal, said can end includingan end panel, a surrounding chuck wall, and a peripheral curl, saidchuck wall tapering towards said end panel, and a coating ofthermosetting adhesive on said chuck wall, said adhesive coatingdecreasing in thickness away from said end panel and having an exposedsurface of a cylindrical configuration whereby a maximum amount ofadhesive is available for the later bonding of said chuck wall to a canbody.

11. A can end particularly adapted for use as a part of a can subjectedto internal pressure and formed of lighter than normal gauge metal, saidcan end including an end panel, a surrounding chuck wall, and aperipheral curl, said chuck wall tapering toward said end panel, and acoating of adhesive on said chuck wall, said adhesive coating decreasingin thickness away from said end panel and having an exposed surface of acylindrical configuration whereby a maximum amount of adhesive isavailable for the later bonding of said chuck wall to a can body.

References Cited UNITED STATES PATENTS 504,547 9/ 1893 Winfield 220-67816,625 4/1906 Wallace et al. 220-67 2,154,349 4/ 1939 OBrien 220-672,584,095 1/ 1952 Slaughter 220-67 THERON E. CONDON, Primary Examiner.

J. R. GARRETT, Assistant Examiner.

